maxIf

maxIf

The suffix -If can be appended to the name of any aggregate function. In this case, the aggregate function accepts an extra argument – a condition.

maxIf(column, cond)

Examples

tip

numbers(N) – A table for test with the single number column (UInt64) that contains integers from 0 to N-1.

mysql> SELECT max(number) FROM numbers(10);
+-------------+
| max(number) |
+-------------+
|           9 |
+-------------+

mysql> SELECT maxIf(number, number < 7) FROM numbers(10);
+-----------------------------+
| maxIf(number, (number < 7)) |
+-----------------------------+
|                           6 |
+-----------------------------+